Tire-building machine.



G. F. FISHER TIRE BUiLDING MACHINE.

APPLLCATION EILED mac. 31, 1915.

Patented May 29,1917. 3 SHEETS-SHEET 1.

M W M N A TTOHNEY I 6., F. FISHER. IIRE'BUILDING MACHINE. APPLICATION' FILED DEC. 31. 1915.

Patented May 29, 1917.

3 SHEETS-SHEET 2.

a R V m WITNESS 5.94

HIS A ITORNEY e. F. FISHER..

TIRE BUILDING MACHINE.

APPLICATION FILED DEC. 31, 1915.

Patented May 29,1917.

BSHEETS-SHEET 3.

7 l9 IIVVE/VTOR GeazyeFFz's/zez; 40 By HIS ATTORNEY I simplified and improved device for posi? tively and accurately pressing the tire ma- TIRE-BUILDING- MAGHIN E.

Application filed December 31, 1915. Serial No. 69,547. v

To all whom it may concern:

Be it known that I, GEORGE F. FISHER, a citizen of the United States, residing at Roselle, county of Union, and State of New Jersey, have invented certain new'and use ful Improvements in Tire-Building Ma-- chines, of which the. following is a full, clear, and exact description.

This invention relates to tire building'machines, and has foran object to provide a terial to partake of the configuration of the tire forming core.

It is important that the various plies of material upon the ring core be shaped to intimately partake of the configuration of the core. Usually rubber treated fabric cut on the bias is employed in the construction of tires, since this may be readily stretched radially of the core to 'foreshorten it at the margins to make it conform tothe continually decreasing circumferences of the core asit approaches the inner edges of-the core; Fabric cut on the straight, that is, fabric in which the warp threads are disposed parallel to the out edges, has not been in general use due to the difiiculty of properly fore-' shortening it to conform to the core as above described. a

A The present invention provides apparatus which facilitates the general use of either biascut fabric or fabric cut on the straight,

and to attain this end employs presser fingers which are positively recip rpcated substantially tangentially 'torthe core at respec-' tive ratios of speed relatively to corresponding portions on the surface of the core and serve to foreshorten and compact the excess material at the sides of the tire to conform to the configuration of the sides of the core.

The invention can be readily understood from the following description taken in con- F'g. 2 isi9; w I iniFig: 1' with parts broken away aisia detail P n s i i t f f- "fijf 'i'in full lines in operative core'whichipasses underneath "tlie IILth r dotted lines released p Arena GEORGE r. rrsnnn, or ROSELLE, NEW JERSEY, AssIeNon TO THE Bastions-k6 WQBKS COMPANY, A. CORPORATION OF CONNECTICUT.

Specificati0nof Letters Patent.

showing the position Of'thapresser fingers are carried.

The core is revolubly'mounted upona sta The fingers are pivoted as 'S'Htarat 7 drive shaft 26 of the core withla slraft' 27i which, a

' gears *28 l shaft 30., :The fingers on at substantially'tangentiallyt the surface f of the partsshown" thefcore by-the above described inech'arfi l? speed of the fingers being suficiently faster;

the presser fingers infullllinesat fone f of stroke and in dotted lines'ajt .thefopp iw limit'of stroke; i

Fig. 5'isa viewv showing the position lof fingers in laying theinner'plie Fig. 6 is a detail crosssectional in laying the outer plies;' c H Fig. 7 is a fragmentary cioss setiona view on the line 7""7,- Fig. f4; v v I J; Fig. 8 is a detail perspective flviewj'offthe rock arm upon Which the press/eff Referring now to thedravvilifg's, like characters of referenc'e'dsi'gnate" si, 7 lar parts, 10 designates aha is mounted a frame 11 that support, 1 stock roll 12 from which. round s'fld'fplr of rubber treated fabric 13, 'eith erbiasforoxi the' straight, are supplied. to ring are-14:

ard 15 and is adapted as usuaItobe power driven as indicated at 16 or otheirwi ing each single revolutionibff th co' round of fabric is th roll onto the core, the. liner stripwhi" H arates the convolutions of thestock route ing simultaneously spooled u flo'na 011 1 In the present embodiment" tion, on each side oftthe iclore a presser fingers 18 is positio r/ substantially tangentiallyfto 'tli H working faces 19 of the fi ened to frictionally conta and conform to the contour diaglly from near the tread core to near the bead port a rock arm 21 which is pivoted 9 5 22 upon a'support 23*and is rocked by eccentric 24-. A chain drive 2'5 tenants-tn through'theinstifum tali t o a sh core fare rec'iprocateil 's'im l- Said mechanism recip'rocatesthe-"fingers-i at a predetermined ratio of speed'rlativel to the surface speed of that portion "ofj 'th than the corresponding portion of the core 119 fragmentary?cross sctioriali to enable each finger to frictionally urge the rfabric forward in the direction ofrotation of the core and thus produce foreshortening of that portion of the fabric which passes underneath it. Each successive .fin'geris at a .greater distance frOmthe pivot 22 of the arm than, and consequently -moves at a fasterspeed and has a greater length of. stroke than, its'pre-' ceding neighbor nearer the tread portion of the core. Therefore,.the foreshortening ac I tion of the fingers will be least near the tread portion of the-core, will be greatest near the bead-portion of the core, and will be.g'raduated between these extremes. As a result the sides of the'fabric will be foreshortened at all points to conform accurately to the constantly decreasing diameters of the core from near the tread portion to near the head portion. I

Each series of fingers is carried as a unit in a respective frame 31, the fingers being yieldingly held against the side of the frame y a spring 32.- Each finger has a joint 33 near its pivoted end: which permits independent lateral movement of the. finger against the pressure of the spring to conform-:to the contour of the" fabric laid upon the core. The frame 31 is connected" by a bell crank lever 34 which is connected by a rod '357with a crank 36 on a'rock shaft 3 the latter having a cam arm 38 which is operated by a cam. 39 on tlie shaft 30/ The cam is timed to move the frame- 31 laterally to press the working ends of .the fingers againstthe fabric just prior to the beginning of the forward stroke and permit the fingers feathering on the fabric during their return stroke. Q

The lowermost of the series of fingers 18 is provided'with a tool 40 having an additional working face 41 adapted to conform to the contour of'the head 42 of the tire, the tool being mounted upon a pivot 4&3 to per-. mit of either the working. face 19 or the working face 41being applied to'the fabric. The tool islocked in either of its two operative positions by means of a spring pressed pivoted bar 44 having a fin 45 adapted to enter a corresponding groove 46 in the pivot of the-tool.

In operation the end of the strip 13 of fabric is trained first between tensioning :rollers 47, one of which is equipped. with diverging ribs or other devices to remove longitudlnal wrinkles from the strip. Thence it is-passed' underneath the working ends of the fingers18 and is applied to the ring core tov which it adheres. The machine is then started and during each revolution of. the core a. round of the fabric is drawn onto the core. The fingers reciprocate positively duri 'otation of the core and foreshorten'the fa ric to'conform to the surface configura- 165 than of the ore substantially at the moment masses it arrives thereat from the fabric supply.

After the inner plies are laid, the machine is stopped, the beads are applied, and the corresponding faces of the tools 10 are turned to operate upon the fabric.- The. operation of the machine is then continued until ,the tire reaches its required dimensions. Y

I do not limit myself to the construction illustrated and described since various changes may be made within the scope of the appended claims.- For instance, the working ends of the fingersmay be disposed to extend in other directions than radially of the core. Again the fingers themselves 1 ay bereciprocated in other direction than substantially tangentially although the latter is preferable. I do not'limit myself to the mechanism illustrated for reciprocating the fingers as equivalents may be employed. Nor do I limit myself to a positive drive from the ring core shaft as a separate source of power may be employedif desired. In fact, there is a wide latitude of variations in the constructiomrelative location of parts, timing of relative speeds, and so forth, that may be made without departing from the spirit or sacrificing any of the advantages of the invention.

When in the following claims I use the term substantially tangentially, I mean the term to include circumferential, and diagonal directions other than radial with respect to the surface of the core. And when I usethe term presser finger, I mean the term to include any device having the function of exerting a pressure in the direction of the core upon tire material during the tire bail ding operation.

Having thus described my invention what I desire to protect by 'Letters Patent is:

1. A tiret building machine embodying a revcluble 'core for receiving material, and positively reciprocating presser fingers adapted to push the material inlthe direc 11( tion of rotation of thecore for shaping the material on the core. I v i 2. A'tire building machine embodying a revoluble core for receiving material, presser fingers adapted to contact with the 'material, and means for positively reciprocating the fingers substantially tangentially to the core. 1

3. A tire building machine embodying a revoluble core for receiving material, presser. fingers adapted to frictionally contact with the material, and means for. positively reciprocating each finger substantially tangentially; to and'at' a predetermined 'ratioof speed relatively to, a corresponding portion on the surface of the, core.

4. A tire building machine embodying a revolub'le core for receiving material, a series of presser i adapted to fi ictionaiiy contact with the the tread portion to near the head portion of the core, and means for positively re-.' ciprocating each finger substantially tan gentially' to the core and at a different speed than its neighbor inthe series.

5. A tire building machine embodying a revol'uble "core for receiving material,

presser fingers adapted to friction'ally contact with the material from near the tread portion to near the bead portion of the core,

and means for positively reciprocating each finger substantially tangentially to the core and at a' faster speed than its neighbor nearer the tread portion of the core:

6. A tire building machine embodying a revoluble core for receiving material,

presser fingers adapted to frictionally contact With the material from near the tread portion to near the head portion of the core, and means for reciprocating said fingers as a unit substantially tangentially 0fthe core at different speedsfroin each other. 7. A tire building machine embodying a revoluble core for receiving material, a series of presser fingers adapted to friction.- ally contact with the material, an arm oarryingsaid fingers, and means for rocking said arm to reciprocate said fingers substantially tangentially to the core.

8. A tire building machine embodying. a revoln'ole core for receiving material;

presser fingers adapted to frictionally. contact with the material, means for positively reciprocating each finger substantially tangentially to the core at a predetermined ratio of speed relatively to a corresponding portion on the surface of the core,. and

- mean s adapted to inove said fingers laterally toward the .core prior to the stroke of all " such contact.

. 10. A tire building machine embodying a revoluhle core for receiving material, separate yielding presser fingers adapted to contact with the material and conform to the configuration of the core radially, and means for reciprocating each finger "sub-- stantially tangentially to the core at a predetermined ratio of speed relatively toa corresponding portion on the surface'of the so core. i p

. Signed at New YOl'li,'N6W Xork, this 30th day of December, 1915.

GEORGE F. FISHER. 

